Those look like Asian carp. They are a very successful invasive species in the Mississippi river basin who are destroying game fish and are threatening to invade the Great Lakes. Check out:http://rileysowner.blogspot.com/2008/03/asian-carp-dont-want-them.html

The boys thank you for this educational diversion from their school work :0)

Where is this? Is this some kind of Cajun thing?

Actually, the first thing it brought to mind is the stories a friend of ours tells. He goes way, way up the Amazon River for ministry. Down there the last thing you want to be doing is shining a light around at night.

The internet research I did, which I admit was limited, indicated this carp is different than the European variety and actually tasted pretty good if kept fresh. Some commercial fisherman are actually switching to Carp and selling them to places like Japan. They say their profits went up! (apparently they get them to jump into nets after they've been hearded somewhere.